Automatic air-exhaust for centrifugal pumps.



I c. E. GRUNSKY. AUTOMATIC AIR EXHAUST FOR CENTRIFUGAL PUMPS. APPLICATION FILED MAY14 I 1914.

1,157,216. Patented Oct. 19, 1915.

CARL E. GRUNSKY, OF SAN FRANCISCO, CALIFORNIA.

AUTOMATIC AIR-EXHAUST FOR CENTRIFUGAL PUMPS Specification of Letters Patent.

Application filed May 14, 1914. Serial 0. 838,427.

To all whom it may concern.

Be it known that I, CARL E. GRuNsKY, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Automatic Air-Ex, hausts for Centrifugal Pumps,-of which the following is a specification.

This invention relates to an automatlc air exhaust for centrifugal pumps and the like.

It is one of the objects of the present invention to provide a simple, substantial,

easily applied air exhausting device for centrifugal or other types of pumps, the efficiency of which is improved by a complete removal of such air as may accumulate in the volute of the pump or at high pomt along the discharge pipe. 7

Another object of the present invention 1s to provide an air exhauster for the purpose described, which is automatic in action and which is adapted to be operated by a very small portion of water conducted from the discharge side of the pump.

Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawing, in which the figure is a diagrammatic side elevation of a pump showing the application of the invention.

The purpose of this apparatus is to remove air automatically from the pump and from its discharge pipe after the pump has been primed by some other apparatus yr device.

Referring to the drawing, A indicates a suitable form of centrifugal pump, 2 the discharge pipe, and 3 an aspirator of suitable construction. The aspirator is in this instance operated by water taken from the discharge pipe 2 through a pipe 4, and the suction side of the aspirator is connected by a pipe 5 with the high points of the pump volute and discharge pipe as at .7 and .8.

The automatic removal of any air tending to collect in the high points of the volute and discharge pipe causes the efliciency of the pump to be considerably increased, especially where the discharge pipe is used as a siphon in passing over levees and the like.

aspirator connected as here shown is absolutely automatic in operation while the pump is in action. A valve 9 mounted on the pipe 4 is turned on when it is desired to bring the aspiratorinto action. The water discharging from the aspirator may be turned back into the sump, or source with which the suction of the pump is connected, or it may be discharged into the suction pipe. In the former case the entrained air is discharged with the water from the aspirator; in the latter case the entrained air is periodically discharged into the open from an air dome or chamber connected with the aspirator. The volume of water used in connection with the operation of the aspirator is negligible when compared with the discharge of the pump and is, therefore, unobj ectionable. v

The principle here involved is the utilization of the pressure in the discharge or pressure side of the pump to create an exhaust action for removing the trapped air in the high points of the pumping system, and it is manifest that this principle may be embodied in various forms.

Having thus described my invention, what I claim and desire to secure by Letters Patent is-- Patented. Oct. 19, 1915.

1. In combination with a pump having a discharge pipe, an aspirator connected to the discharge pipe of the pump, a second connection between the aspirator and discharge located in advance of the point where the aspirator is connected to the discharge, and a connection between the high point of the pump and the second named connection between the aspirator and discharge.

2. In combination with a centrifugal pump having a discharge pipe, an aspirator with a water pipe connection with the discharge pipe of the pump and an air pipe connection between the aspirator and the summit points of the discharge pipe and pump- I 3. In combination with a centrifugal pump having a discharge pipe, an aspirator connected to the discharge pipe of the pump and actuated with water from the discharge pipe and an air pipe connection between the aspirator and the summit points of the discharge pipe and pump.

4. In combination with a centrifugal pump having a discharge pipe, an aspirator connected to the discharge pipe of the pump and actuated with-water from the discharge I pump having a discharge pipe, an aspirator with a water pipe connectionv with the discharge pipe of the pump, an air pipe connection between the air chamber of the aspira- 10 tor with the highest point of the pump and.

a second air pipe I connection between the aspirator and the summit points on the discharge pipe. i

In testimony whereof I have hereunto set my hand in the-presence of two subscribing 15 witnesses.

CARL E. GRUNSKY. Witnesses JOHN H. HERRING, A. K.- DAGGETT. 

